Aluminum lined shell



March 12, 1940. s, TACKLER 2,193,573

ALUMINUM LINED SHELL Filed June 16, 1959 ll V INVENTOR Sanza/el fdczel Patented Mar. 12, i946 NETE@ STATES PATNT '@FMQ aiaasis anniv-mam man einem.

Samuel Tackles, New Ycrh, N. i?. application .nine ie, rase, senat No. matti 3 Claims.

This invention relates to new and useful improvements in aluminum lined shells and methods for the manufacture thereof.

The invention has for an object the construction of a shell characterized by aluminum lining therein to facilitate the manufacture and imu prove the cartridge.

Still further the invention contemplates the provision of the aluminum material for increasing the strength of the shell. l'

As a'further object the invention contemplates the use of the aluminum lining for increasing the internal lubricative quality of the shell so that the gases liberated by the explosion may more efficiently hurl the projectile forward.

Still further the invention contemplates a novel arrangement for securely holding the aluminum lining within the shell.

Another object of the invention resides in a novel arrangement for reinforcing the aluminum lining.

Still further the invention proposes a novel method of forming the aluminum lined shells.

For further comprehension of the invention, and of the objects and advantages thereof, reference Will be had to the following description and accompanying drawing, and to the appended claims in which the various novel features of the invention are more particularly set forth.

In the accompanying drawing forming a material part of this disclosure:

Fig. l is a perspective View of a cartridge constructed according to this invention.

Fig. 2 is a longitudinal sectional view of the shell portion of the cartridge, illustrated per se.

Fig. 3 is a sectional View of the shell taken on the line '3 3 of Fig. 2.

Fig. 4 is a perspective view of the cartridge constructed according to another form of' this invention.

Fig. 5 is a horizontal sectional view similar to Fig. 3, but illustrating the modified construction shown in Fig. 4.

Fig. 6 is a schematic perspective developed View of the outer shell member before stamping, of the device illustrated in Fig. 4.

Fig. '7 is a similar view to Fig. 6 but illustrating the aluminum lining member.

The aluminum lined shell, according to this invention, includes a drawn brass shell l0 and a drawn aluminum sheet Il, lining the inner face of said shell. The shell l 0 has an open outer end Ill and a closed inner end mb. This inner end is formed with an outwardly bulged area i.

(CE. 11W-i6) The drawn aluminum lining li is similarly formed as the shell it. It is provided with an open outer end tl l, a closed inner end lib, and a projecting area portion lic. The aluminum lining is `in intimate contact with the shell iii throughout its interior face area.

One method of forming the shell `consists. in superimposing an aluminum sheet upon a brass sheet and then stamping and drawing the shell so that sheets are simultaneously formed into the shell.

In Fig. l a cartridge is shown formed from. the shell. This cartridge has a slug l2 engaged in the open end thereof. Suitable explosive material, not shown on the drawing, is housed Within the bullet, as is customary.

In' Figs. i to 7 another modied form of the invention has been disclosed in which. the aluminum lined shell is made from a brass shell disc lil having spaced radial il-shape grooves 2@ l superimposed upon the brass shell disc it and a shell is drawn and formed with the usual closed bottom end lb having a projecting adjacent area it". Numeral l2 indicates the slug of the shell. These double sheets, form a solid aluminum lined shell body, which will irmly stay together.

While l have illustrated and described the preferred embodiments of my invention, it is tobe understood that I do not limit myself to the precise constructions herein disclosed and the right is reserved to all changes and modications coming within the scope of the invention as dened in the appended claims.

Having thus described my invention.' what I claim as new, and desire to secure by United States Letters Patent is:

1. An aluminum lined shell, comprising a drawn brass shell, and a drawn aluminum sheet lining the inner face of said shell, and said brass shell having a cylindrical wall portion, a closed bottom end, and a projecting area encircling said bottom end, said brass shell being formed with radially extending grooves on its closed end and longitudinally extending grooves along its sides, and said aluminum sheet lining being formed -with corresponding radially arranged ridges adapted to ilrmly engage the said grooves in the brass shell.

2. An 4aluminum lined shell, comprising a drawn brass shell, and a drawn aluminum sheet ng the inner face of said shell, and said brass ll having a cylindrical wall portion, a closed tom end, and a projecting area encircling said tom end, said brass shell being formed with ,ially extending grooves on its closed end and gitudinaily extending grooves along its sides, l said aluminum sheet lining being formed h corresponding Lpted to rmly engage the said grooves in the ,ss shell, said grooves and ridges being arlged along the adjacent surfaces of the brass :ll and aluminum lining, respectively, and beof V shape in cross section.

l. A shell, comprising a drawn brass shell hava cylindrical Wall portion and a closed bot- 1 end, a drawn aluminum sheet lining the radially arranged ridges inner face of said brass shell and following the contour thereof, said shell being formed with a plurality of radially extending grooves on the inner face of its closed end and said sheet of aluminum being formed with a plurality of complementary arranged radial ridges engaging into said grooves, said shell being formed with a plurality of longitudinally extending grooves continuing from the ends of said radial grooves and along the inside face ofA said cylindrical wall portion-and said sheet being formed with a plurality oi' complementary arranged ridges continuing from the ends of said radial ridges and engaging into said longitudinal grooves.

SAMUEL TACKLER. 

